This won't work

Dockerfile

@@ -0,0 +1,2 @@
+FROM alpine
+CMD ["echo", "Hello StackOverflow!"]

Dockerfile~

@@ -0,0 +1,21 @@
+FROM node:16
+
+# Create app directory
+WORKDIR /usr/src/app
+
+# Install app dependencies
+# A wildcard is used to ensure both package.json AND package-lock.json are copied
+# where available (npm@5+)
+COPY lifetracker-server/package*.json ./
+
+RUN ls --recursive ./
+
+RUN npm install
+# If you are building your code for production
+# RUN npm ci --omit=dev
+
+# Bundle app source
+COPY lifetracker-server .
+
+EXPOSE 8080
+CMD [ "node", "server.js" ]

captain-definition

@@ -1,10 +1,4 @@
 {
  "schemaVersion" : 2,
- "dockerfileLines": [
-    "FROM node:12-alpine",
-    "RUN mkdir -p /usr/src/app",
-    "COPY ./lifetracker-server /usr/src/app",
-    "RUN npm install && npm cache clean --force",
-    "CMD [ \"npm\", \"start\" ]"
-]
+ "dockerfilePath": "./Dockerfile"
 }